Don't know if or why this has no been discussed, but it seems like this would be the only logical step, when traveling (probably not for everyday use).
http://www.neptunic.com/sharksuits_csuit.htm
http://blog.wired.com/gadgets/2007/09/sharksuits-cont.html
Seems like no zombie would have the bite force of a shark. In event of zombie infestation-- first thing I'm getting is the above. Said the first was 18pounds, now with titanium alloy and fibers, it would be just like normal clothing...
Also-- Steroids. With no one to control these substances, almost every survivor will be on them with the thought of trying to "up" the competition. I would think I would take small doses (read: try not to get addicted to new power) just to increase my power, speed, agility. Guns will help from a long range perspective, but hand-to-hand combat, you need to be able to overwhelm them.
Just my .02.